root/arch/x86/include/asm/cmpxchg_64.h

INCLUDED FROM

DEFINITIONS

1. set_64bit

#ifndef _ASM_X86_CMPXCHG_64_H
#define _ASM_X86_CMPXCHG_64_H

static inline void set_64bit(volatile u64 *ptr, u64 val)
{
        *ptr = val;
}

#define cmpxchg64(ptr, o, n)                                            \
({                                                                      \
        BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
        cmpxchg((ptr), (o), (n));                                       \
})

#define cmpxchg64_local(ptr, o, n)                                      \
({                                                                      \
        BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
        cmpxchg_local((ptr), (o), (n));                                 \
})

#define system_has_cmpxchg_double() cpu_has_cx16

#endif /* _ASM_X86_CMPXCHG_64_H */